Tube forming and coating machine.



M. R. WOODWHD.

TUBE' FORMING AND COATING MACHINE.

APPLICAT-lon FILED APR.17, 1908.

LMGAGO Patented May 25, 1915.

2 SHEETS-SHEET l.

IVI. R. WOODWARD.

TUBE FORMING AND COATING MACHINE.

APPLICATION FILED APR. 17| |908.

Patented May 25, 1915.

UBVENTOR 2 SHEETS-SHEET 2.

MAR-K JR'. WOQBWARJD, 0F WASHINGTON, DISTRICT 0F COLUMBIA.

TUBE FORMING AND COATING MACHINE.

- Application led April 17, 1908.

' coat one or both surfaces of one or both of the strips before they were formed into a tube; or to cut the tube into sections or lengths and immerse the latter in the coating material, thus coating both 'surfaces thereof. rlhe first method has been found to be unsatisfactory, while in the second the amount of coating placed on the sections could not be regulated, thus causing a great waste of the material.

lt is the object of this invention to overcome the above `objections by providing the .former, on which the tube is formed, with means for applying a coating of proper thickness to the inner surface of the tube.

Another object of the invention is to combine with the tube forming mechanism means for applying a coating to the outer or exterior surface of the tube.

A further object of the invention is to regulate the supply of the coating material to one or both surfaces of the tube.

Referring to the drawings-Figure 1 is a plan View of a machine embodying my invention; Fig. 2 is a side elevation `of the machine illustrated in Fig; 1, with parts of the tubeJ forming mechanism removed therefrom. Fi 3 is a longitudinal section of a portion o the former. Fig. 4 is a' transversesection of the former on`the line 4 4, `f Fig.'3.fff'Figs. 5, 6 and 7 are views illustrat- '4a means. Fig. 8 is a transverse section on'the ing dierent forms of the interior coating line 8;-8, Fig. 5. v Fig. 9 is atransverse section cn the line 9--9, Fig. -1.

11n Ithe drawings, A indicates a suitable frameor bed, mounted upon legs a.

2 indicates a standard risingy from the bed near one end thereof andy adapted to support a tube former 3. The former 3 is preferably made hollow and may be held stationary in the standard or caused to rotate in suitable bearings therein.

Specification of Letters Patent.

Serial No. 427,592.

'4, 4, indicate the strips of flexible material arranged to be fed continuously from opposite sides of the former, and at an angle thereto.

4 indicates a glue receptacle mounted in close proximity to one of the strips of material, and 4 indicates a roller or wiper adapted to apply glue orv paste to one surface of the strip for uniting it to the other strip as they are formed into tube shape on the former.

rlhe means for forming or winding the tube upon the former may consist of any sultable or preferred mechanism. l have shown one suitableform of mechanism, in which 5 indicates an endless belt for spirally winding the strips on the former continuously. rllhe belt 5 is coiled around the former and is also carried around pulleys 6, 6, mounted on vertical shafts 7, 7, on opposite sides of the former, whereby the belt may be driven. One of the vertical shafts 1s provided with suitable gears meshing with gears (not shown)l carried by a driven Shaft 8, extending longitudinally of the bed A.

9 indicates a stepped pulley keyed to a shaft 10. rll`his shaft has a spur gear 10 adapted to drive a counter shaft 11 by means of a gear 1l. From the shaft 11, motion is communicated to the maindriv'ing shaft l2 through the pinion 12', gears 13, 13, (one of which is loosely mounted on the shaft 1.0), and intermediate pinion 13.

14 indicates a rod connected at its opposite ends by universal Joints to the main driving shaft and the shaft 8.

llf desired, both pulleys 6, 6, may be positively driven. `Insuch case, the pulley on that side* of the former opposite to the .shaft'US'islgeared to a cross shaft 8', which 1s driven by suitable gearing from the ,Y WhileT have described but one winding beltivand. beltgdriving mechanism, it will bev understood that 'the machine may be rovidedwith'iiiore .than one belt and belt driving mecha Fi.

ombinedwithf-the tube forming mechamsm are means for applying a coat .of material, such, asia-waterproofing material, to the inner surface'of the tube after the two strips of flexible; material have been formed into tube shape. These coating means are mounted on orformed in the surface`of the as may be desired (see Patented May 25, MM5.

former 3, at some suitable distance beyond the tube forming means, .as shown in Fig. 1, and :comprise a channel or opening 15, of suitable length, over which the tube` passes as it moves toward the free end of the former. By conducting to the channel a supply of the coating 'materiah the formed tube, which fits closely tothe former, re-

i ceives an application of the material over its entire inner surface.

The source of supply for the material is indicated at 17. It may consist of a reservoir preferably having a' suitable heater 18, for heating the material to any desired degree. Connected to the reservoir is a pipe 19 which connects with a conduit 20 that is carried through the shaft 10 and its bearings into the former, where it,` extends to and 'is connected with the channel 15,130 conduct thematerial thereto. If desired, an auxiliary or storage chamber 15 may be interposed'between the channel-15 and the inner end of the conduit 20.

, In orderl that the supply of coating material from the reservoir 17 tothe channel 15 j may be regulated, I provide a valve 21 in' one of the pipes. It will be understood that the amountof material applied may also be regulated by raising or lowering its temperature; butthat the valve serves to regulate the supply under any conditions of heat to which thvmaterial may be subjected.

Under some conditions vit is desirable to heat the former. For this purpose I provide a heater, indicated at 22, preferably mounted within the former between the coat-applying means and its free end. It

consistsof an electric resistance, the conductor wires for which are carried through the former, as shown at 23. Any other form of heater may be used according to conditions and circumstances.

In Fig. 5 I have shown a, different form of the invention. In this figure`the coatapplying means comprises a channel 15- formed in the outer surface of the former 3Q 21', 21v indicate a plurality of conduits leading to the channel 15a, Awhereby it may be properly supplied with the material throughout its entire length.

In the forms of tube winding mechanism already described, it will be understood that the former is held stationary, while the tube revolves thereon and is fed continuously,

toward its free end, such movements of the tube being caused by the winding, mechanism. During these movements of the tube every portion of its inner surface passes over the coat-applying means and receives an application of the material. As a result of this operation, the mandrel is lubricated, the waterproofing material is rubbed into the pores of the strips forming the, tube and the crevices between the'edges of the strips filled.

In Fig. 6 I have shown a former adapted for use in a tube winding mechanism wherein it is caused to rotate.y In this form of mechanism it will be lunderstood that the tube revolves with the former, but moves.

tubes. The formery 3 is provided with a circumferential coat-applying channel 15. 20', 20', indicate conduits leading to the coat-applying channel for supplying the material thereto. f i

When it -is desirable to apply a coating of some material to the exterior surface of the tube, I combine with -the tube forming mechanism suitable coat-applying devices,

that are mounted on the machine bed, separate from the interior coat-applying means. 'These devices consist. of a` receptacle 26, preferably arranged below the former, and, when -so arranged, its top plate is provided with a channel 26, in communication with the said receptacle, whereby the coating material may be brought into contact Withand be applied to the outer surface ofthe tube. The channel 26 is preferably longer than the width of the strips of which the tube is formed.. The top of the receptacle that4 engages with the tube is preferably concaved to conform to the general shape of the tube and assists in spreading the material thereon. y

The receptacle 26 is mounted on a base 27 through which a feed pipe, secured to the receptacle, extends. Between the pi and the base isa' packing and a gland 2 which screw -threads into the base 27. The

gland 27 is provided with a sleeve 29 over which fits an adjustable plate 30. This plate is movable up or .down on the sleeve and may be secured in any position by a set screw 29. The receptacle is preferablyyieldingly supported in order that the coatapplying devices may readily adapt themselves to any irregularities in the tube or to tubes formed of different thicknesses of material or tubes formed" of one or more strips of material. For this purpose, the receptacle 26 rests on a plate 31 between which.

and the plate 30 are provided springs 31.

29a indicates a conduit for supplying the coating material to the exterior coating devices. This conduit is connected with a chamber 32, into which the pipe 28 telescopes, at one end and at its opposite end the invention relates.

with the reservoir 17. A valve 32 controls the supply of material through the conduit 29a.

33 indicates a branch pipe that may lead to a reservoir containing a coating material diiferent from that contained in the reservoir 17 and 33 indicates a suitable valve in such branch pipe.

By properly operating the valves 32 and 33', a coating material may be applied to one surface of the tube and a different coating material applied to its other surface; or only one surface coated as may be desired. When only the inner surface of the tube is to be coated, the exterior coat-applying devices may be moved out of engaging position by adjusting the plate 30, or they gray be entirely removed from the machme It will be understood that my invention is not limited to the forms of construction chosen for illustrative purposes herein, but that it may be embodied in other` forms of construction, Without departing from its spirit, by those skilled in the art to which What l claim is:

l. ln a machine of the character described, the combination of a former, means for forming a tube thereon and feeding it along the former, the said former being,

formed with a channel or opening in its surface, and means for supplying a suitable material to, said channel.

2. ln a machine of the character described, the combination of a former, means y,for forming a tube thereon and feeding it along the former, the said former being formed with an elongated channel in its surface, means for supplyingia suitable inaterial to said channel, and a valve for regulating the arrount of material delivered to said channe 3. The combination of a mandrel having an elongated material holding channel in its peripheral surface, means for continuously l' forming a tube on the mandrel and feeding it therealong, a reservoir, and connections between the reservoir and the channel formed in the mandrel for supplying the material thereto.

fl. rThe combination of a mandrel having an elongated material holding channel in its peripheral surface, means for continuously forming a tube on the mandrel and feeding it therealong, a reservoir, connections between the reservoir and the channel formed in the mandrel for supplying the material thereto, and means for heating the mandrel.

5.A In a. machine of the character described, the combination of amandrel having a channel formed in its surface between its opposite ends, adapted to hold a coating material, means for forming a tube on the mandrel I and feeding it therealong and relative to the SEE channel formed in the mandrel, whereby the internal surface of the tube will receive an application of the coating material, a reservoir and connections between the reservoir and the channel for supplying material thereto.

6. In a machine of the character described, the combination of a mandrel having a channel formed in its surface between its opposite ends, adapted to hold a coating material, and means for forming a tube on the mandrel and feeding it therealong and relative to the channel formed in the mandrel, whereby the internal surface of the tube will receive an application of the coating material.

7. In a machine of the character described, the combination of a former, means for spirally winding a tube on the former and for moving it longitudinally and circumferentially simultaneously relative thereto, the said former being formed with an elongated channel in its surface, a reservoir for a coating material, and connections leading through the former for supplying coating materialfrom the reservoir to the said channel, whereby as the tube moves longitudinally and circumferentially of the former it receives a coating of the material from said channel. .n

8. ln a machineof the character described, the combination of a tube forming mechanism, means operating after the formation of a tube by the tube forming mechanism for coating the interior surface of the tube, and separate means for coating the exterior surface thereof.

9. ln a machine of the character described, the combination of tube forming means comprising a former provided with means for applying a coat of material to the interior surface of the tube and means for feeding a strip of Hexible material to the former, means, leading through the former, for supplying the coating material to the interior coat-applying means, and separate means for applying a coat to the exterior surface of the tube.

10. lin a machine for coating tubes, the combination of a former, means for moving a formed tube along the former, a coatapplying device provided with a channel ar- 'supporting the coat-applying device in engagement with the tube. ll. lin a machine of the character described, the combination of tube forming means, means for coating the interior surface of the 'tube after the formation thereof, separate means for coating the exterior surface of the tube, and means for heating the former.

l2. lin a machine of the character described, the combination of tube forming means, means for coating the interior surlface of the tube after the formation thereof, separate means for coating the exterior surface of the tube, and means, interposed be? tween the interior and exterior coating means, for,heating the former.

` 13. The combination of a former, means for forming a tube thereon, means'for coating the interior surface of the tube, separate means for coating the exterior surface of the tube, .and'means for adjusting the exterior coating means relative to the tube.

for forming a tube on the former and moving the formed tube longitudinally and circu'mferentially thereon, and means for applying a coating material to the tube, the said means comprising a material holding receptacle having a concaved wall arranged to engage the exterior surface of the formed tube, said-concaved wall being formed with an opening through which the coating material passes from saidreceptacle whereby the entire exterior surface of the formed tube is coated, and means for supplying materialto said receptacle.

16. The combination of a former,' means .for forming a tube thereon, and means for `said means comprising a materiaLholding applying aeoating material to the tube, the

receptacle having a concaved wall arranged to engage `the exterior surface of the'formed tube, said concaved wall being formed with a centrally disposed elongated opening ex- `tending longitudinally of the former and permitting the material to iiow from the receptacle for application on the tube, and Imeans for supplying material to said receptacle. i j

17. Ina tube forming and coating ,machine, the combination of a former "formed with an elongated material holding channel extending circumferentially around the for- 'mer, a reservoir, connections between the reservoir and the said channel or `receptacle for supplying material thereto, and means for forming a tube on the former and moving it longitudinally thereof and pastl the said channel, whereby the tube receives a coating of the material contained in the Achannel upon its inner surface by the ,operation of moving over it. v 18. In a tube forming and coating machine, thecombination of a former formed with an elongated channel extending cir- -cumferentially andl also longitudinally of) the former, a. reservoir, connections betweenplate formed with the reservoir and the said channel for sup# plying material thereto, and means for its inner surface by the operation of movingover it.

19. The combination of a former, means for forming a tube thereon, coat applying` devices for applying a coating to the `exterior surface of the tube after it is formed,` the said devices including a plate formedv with an elongated opening through which a coating material passes and arranged tov engage the tube, whereby Asaid. tube is coated, and means for yieldingly supporting'v the said coat applying devices.

20. The combination of a former, means for forming a tube thereon, coat applying devices for applying a coating to the exterior surface of the tube after it is formed, the said devices including a plate formed with an elongated opening through which a coating material passes and arranged to engage 'the tube, whereby said `tube is coated, means for yieldingly supporting the said coat applying devices, andmeans for ad]usting the said coat applying devices.

21. The combination of a former, means for forming 4a tub@ thereon, means, includingfa concaved plate -having anelongated channel formed therein and extending in a line parallel'to the former and arranged to engage with the exterior surface of a tube -for applying a coating thereto, and means for supplying coating material to the said .i

coat rapplying means. f

22. The combination'of a former, means for forming a tube thereon, a coat applying device arranged to engage with the exterior surface of a tube formed on the said former and having a channel formed in its surface for holding a coating material, said channel being longer than the width of the strips of which the tube is' formed, and means for supplying a coating material tothe channel of said coat applying device.

23.y The combination of a former, means for forming a tube'thereon and moving it longitudinally of the former, a material holding receptacle having a 'tube engaging an opening therein through`which the material in the receptacle l passes, connections with a source of supply for the material, a support for the s aid re vceptacle, and springs interposed between 'the receptacle and the support for yieldingly supporting the'p'late of the receptacle' in engagement with the tube.

24:. The combination of a former, means for forming a tube thereon and moving it longitudinally of the' former, a material holding receptacle having a tube engaging plate formedf with an opening tl'n/1 meoeo passes, telescoping connections with a source of supply for the material, a support for the said receptacle, and springs interposed between the receptacle and the support for yieldingly supporting the plate of the receptacle in engagement with the tube.

25. rlhe combination with a hollow mandrel and a belt arranged to wind paper strips spirally about the mandrel to form continuous tubing, of a tank for liquid coating, a conduit leading from the tank in to the mandrel and opening outward through a slot longer than the width of the stock strip and located in the surface upon which the strip slips, whereby the entire inner surface of the winding strip receives a uniform amount of liquid coating.

26. The combination of a mandrel formed with a slot or groove in its outer surface, means arranged to` wind paper strips spirally about the mandrel to form continuous tubing, a tank for liquid coating, and-a conduit leading from the tank into and through the mandrel to the slot or groove, whereby the entire inner surface of the strips receives a uniform coating of the liquid.

27. ln tube making devices, the combination with a mandrel adapted to receive a spirally wound paper strip, ofv means for supplying the entire inner surface of the Pfl I strip wound thereon with a coating material,

and means whereby the coated surface of the wound strip is forcibly rubbed, transversely to the crevice between its turns, whereby the tube is internally coated, the mandrel lubricated, the material worked into the surface of the paper, and the perfect filling of the crevice is assured.

28. rlhe combination with a mandrel and means for winding a paper strip thereon to form a tube, of a chamber withln said .mandrel for a liquid, means for supplying liquid to said chamber to coat the inner face of the tube, and means for controlling the supply of liquid to said chamber.

29. The combination with a mandrel supported atone end and free at the other end, of means for winding a paper strip `thereon. to form a tube, a chamber for 'a liquid located within said mandrel near the free end thereof, and a supply conduit for the liquid ported end thereof.

In testimony whereof l have hereunto signed my name in the presence of two wit-y ELMER G. DEAN, Guo. B. PrT'rs.

`passing into the mandrel through the sup- 

